Abstract: Numerical simulation method can be used to predict coalbed methane productivity, but it is time?consuming, complicated and poor in practicability. This paper presents the dimensionless coalbed methane production curves (type curves) of the early linear flow and the late radial flow by horizontal well development, studies the influences of 16 geological and production factors on the type curves and proposes a set of new methods for simply and accurately predicting such productivity using the type curves or chart. The result shows that the ratio of horizontal interval length vs. coalbed length in the same direction is the main influencing factor on the curves at the early radial flow stage, while the analytic time, coalbed area and fissure permeability are the main ones for affecting the late radial flow stage. The case study indicates that the result from the type curves or chart is of higher accuracy of prediction, with an error of 17.12%, compared with real daily gas production rate